CN101648548A - Wet production process of low-density soft polyurethane foam top lining - Google Patents
Wet production process of low-density soft polyurethane foam top lining Download PDFInfo
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- CN101648548A CN101648548A CN200910182815A CN200910182815A CN101648548A CN 101648548 A CN101648548 A CN 101648548A CN 200910182815 A CN200910182815 A CN 200910182815A CN 200910182815 A CN200910182815 A CN 200910182815A CN 101648548 A CN101648548 A CN 101648548A
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- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 23
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000004814 polyurethane Substances 0.000 claims abstract description 27
- 229920002635 polyurethane Polymers 0.000 claims abstract description 26
- 239000003365 glass fiber Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 22
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- 238000000034 method Methods 0.000 claims description 20
- 238000007493 shaping process Methods 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 10
- 239000004745 nonwoven fabric Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 230000001105 regulatory Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 6
- 229920001971 elastomer Polymers 0.000 abstract 3
- 238000003825 pressing Methods 0.000 abstract 3
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- 239000002994 raw material Substances 0.000 description 1
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Abstract
The invention relates to a production process of a top lining, in particular to a wet production process of a low-density soft polyurethane foam top lining. The production process can be applied to alow-density soft polyurethane foam top lining which is arranged on the top of an automobile and has the effects of heat insulation, sound insulation and beautification, and the production process belongs to the technical field of manufacture of automobile interior parts. According to the technical scheme of the invention, the wet production process of the low-density soft polyurethane foam top lining comprises the following steps: (a) rubber rolling: rolling rubber on the upper surface and the lower surface of a polyurethane material of the top lining by adopting a rubber rolling mill; (b) glass fiber scattering: cutting glass fibers by adopting a cutting machine; (c) pressing to mold: pressing a primary product of the soft polyurethane foam top lining of the step (b) in a mould to press the primary product by utilizing a pressing machine to form a molded semi-finished product; (d) cooling and molding for the first time: cooling the molded semi-finished product to normal temperature, and molding to form a set semi-finished product; (e) jointing surface materials; (f) cooling and molding once again; (g) cutting by a water jet; and (h) mounting accessories.
Description
Technical field
What the present invention relates to is a kind of production technology of roof liner, a kind of wet process technique of low-density soft polyurethane foam top lining specifically, can be used for being installed in automobile top, play the low-density soft polyurethane foam top lining of heat insulation, sound insulation and beautification function, belong to automotive upholstery manufacturing technology field.
Background technology
Automotive upholstery generally is installed on automobile top, the effect of playing heat insulation, sound insulation and beautifying.More and more pursuing High Performance, environment-friendly type, energy-saving, lightweight, personalized epoch, the interior trim of automobile is the same with the profile of automobile, becomes the key factor that people choose automobile.Therefore also more and more higher to the requirement of automotive upholstery.In the prior art, performance figure such as the high sound-absorbing of roof liner, low grammes per square metre, high strength become bottleneck, are restricting the development of roof liner.Existing roof liner normally adopts compound PU sheet material straight forming, and this kind forming process mainly exists following problem: 1, sound-absorbing index out of reach requirement; 2, product rigidity is poor, easily sagging, the jackknifing of product of especially long size; 3, product weight is big, is unfavorable for the car load lightweight, and is energy-conservation.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of sound absorption qualities is good, rigidity is big, be difficult for saggingly fractureing, the wet process technique of the low-density soft polyurethane foam top lining of light weight, and this production process does not have objectionable impurities to produce.
According to technical scheme provided by the invention, the wet process technique of described low-density soft polyurethane foam top lining comprises following steps:
(a), plastic roll: adopt the plastic roll machine to carry out plastic roll in the upper and lower surface of the used polyurethane material of roof liner, the plastic roll motor speed generally is controlled at 35～40 rev/mins, regulate the upper and lower roller pitch of plastic roll machine by the thickness of polyurethane material, can require to regulate each single face spread of polyurethane material upper and lower surface according to the rigidity of roof liner, can not be excessive;
(b), glass fibre is unrestrained: adopt the cutting machine cutting glass fibre, at the even glass fibre of unrestrained well cutting of each single face of the upper and lower surface of the low-density soft polyurethane foam of step a, the density of glass fibre can be adjusted according to the rigidity and the intensity of roof liner, generally is at 90～180g/m
2, there is the upper and lower surface of the soft polyurethane foam of glass fibre to cover nonwoven fabrics and PE glued membrane successively unrestrained again, make the low-density soft polyurethane foam top lining first product; These combination of raw materials have certain supporting role together;
(c), compression moulding: in mould, utilize press to be pressed the soft polyurethane foam top lining first product of step b, form the compacting half-blank; When compression moulding, the patrix temperature is controlled at: 130～140 ℃, the counterdie temperature is controlled at: 130～140 ℃, forming pressure is controlled at: 65～75kgf/cm
2, molding time is controlled at: 50～55sec makes the compression moulding half-blank; After the compacting by heating mould, the moulding of roof liner base material half-blank, after glue was fully reacted simultaneously, smell can satisfy the requirement of automotive trim;
(d), first cooling and shaping: described compacting half-blank is cooled to normal temperature, makes its typing, form the typing half-blank; Typing is an assembling of considering car load, satisfies the matching requirements of roof liner size by cooling and shaping, and part is not yielding;
(e), lining is fitted: paste decorative fabric at the semi-finished upper surface of described typing, the half-blank of should finalizing the design then places the pressurizing attaching of heating in the mould, forms the applying half-blank; The patrix temperature is controlled at during applying: 80～90 ℃, the counterdie temperature is controlled at: 80～90 ℃, laminate pressure is controlled at: 45～55kgf/cm
2, the applying time is controlled at: 30～35sec; Compound requirement that reaches appearance by lining;
(f), cooling and shaping once more: described applying half-blank is cooled to normal temperature, makes its typing;
(g), water cutter cutting: utilize the high pressure water cutting machine to carry out the cutting of water cutter the applying half-blank behind the cooling and shaping, form the cutting half-blank; During cutting, cutting hydraulic pressure is controlled at: 40000～50000psi, the Cutting Gas pressure-controlled exists: 4.0～6.0kg/cm
2Finish the dimensional characteristic that can satisfy assembling according to designing requirement to guarantee part;
(h), annex is installed: described cutting half-blank is installed annex be finished product.Mainly be fool proof mark, the annex of some pad cotton, acoustical cottons, positioning checkpoint, letter buckle or the like be installed according to drawing requirement and substrate backside, be used for roof liner on vehicle body the location and fix.
Glue among the step a adopts the glue of aqua type.Be by a kind of glue of softening water reaction, satisfy the requirement of smell fully, unharmful substance.
The hardening time of steps d is controlled at: 45～55sec.
Decorative fabric described in the step e is selected warp-knitted face fabric or needle punched non-woven fabrics for use.Select different decorative fabrics for use according to the requirement in client market, warp-knitted face fabric is generous, the class height.And the needle punched non-woven fabrics easy cleaning.
The hardening time of step f is controlled at: 45～55sec.
The roof liner weight that makes by method of the present invention can reduce greatly, has satisfied the requirement of car load light-weight design, and the good rigidly of product can make nearly 3 meters long products, can not fracture, sagging, and whole process of production does not have objectionable impurities to produce.
The specific embodiment
Example 1
Production Shanghai GM model is the roof liner of Epsilon II, and the roof liner specification is: 1850 * 1500mm.
The production technology of this roof liner is as follows:
(a), plastic roll: adopt the plastic roll machine to carry out plastic roll in polyurethane material matrix upper and lower surface, roller coating glue is the glue of aqua type, the plastic roll motor speed is controlled at 35 rev/mins, the upper and lower roller pitch of plastic roll machine is controlled at 4mm, and each single face spread on the upper and lower surface of polyurethane material matrix is controlled at 150g/m
2
(b), glass fibre is unrestrained: adopt the cutting machine cutting glass fibre, at the even glass fibre of unrestrained well cutting of each single face of the upper and lower surface of the polyurethane material matrix of step a, unrestrained amount is controlled at 90g/m
2, there is the upper and lower surface of the polyurethane material roof liner matrix of glass fibre to cover nonwoven fabrics and PE glued membrane successively unrestrained again, make polyurethane material roof liner half-blank;
(c), compression moulding: the polyurethane material roof liner half-blank of step b is pressed in mould, and the patrix temperature is controlled at 130 ℃ during compression moulding, and the counterdie temperature is controlled at 130 ℃ during compression moulding, and forming pressure is controlled at 65kgf/cm
2, molding time is controlled at 50sec (second), makes the compression moulding half-blank;
(d), cooling and shaping: the compression moulding half-blank of step c is cooled to normal temperature, makes its typing;
(e), lining is fitted: paste decorative fabric on the semi-finished lower surface behind the steps d cooling and shaping, then this half-blank is placed the pressurizing attaching of heating in the mould, the patrix temperature is controlled at 80 ℃ during applying, and the counterdie temperature is controlled at 80 ℃ during applying, and laminate pressure is controlled at 45kgf/cm
2, the applying time is controlled at 30sec (second);
(f), cooling and shaping: will be cooled to normal temperature through the half-blank that step e lining was fitted, and make its typing;
(g), water cutter cutting: will carry out the cutting of water cutter through the half-blank that step f cooling and shaping is crossed, cutting hydraulic pressure is controlled at 40000psi, and the Cutting Gas pressure-controlled is at 4.0kg/cm
2
(h), annex is installed: the half-blank of step g cutting is installed annex be finished product, annex has letter buckle, and locating dowel pin and pad are cotton.
The device that forms with this roof liner and accessory assembling has following performance perameter:
1. flame retardance satisfies GMW3232,＜100mm/min;
2. acoustic efficiency satisfies GMW14189, and the evaluation by PATAC;
3. colour fastness to rubbing satisfies the requirement of ISO105-B06, test result≤3 grade;
4. smell satisfies the requirement of GMW3025, test result 〉=6 grade;
5. resistance to abrasion satisfies the requirement of GMW1423, through 300 times circulation rear surface outward appearances 〉=6 grades.
Example 2
Production Shanghai GM model is the roof liner of D16, and the roof liner specification is 1900 * 1450mm;
The production technology of this roof liner is as follows:
(a), plastic roll: adopt the plastic roll machine to carry out plastic roll in polyurethane material matrix upper and lower surface, roller coating glue is the glue of aqua type, the plastic roll motor speed is controlled at 40 rev/mins, the upper and lower roller pitch of plastic roll machine is controlled at 8.5mm, and each single face spread on the upper and lower surface of polyurethane material matrix is controlled at 120g/m
2
(b), glass fibre is unrestrained: adopt the cutting machine cutting glass fibre, at the even glass fibre of unrestrained well cutting of each single face of the upper and lower surface of the polyurethane material matrix of step a, unrestrained amount is controlled at 110g/m
2, there is the upper and lower surface of the polyurethane material matrix of glass fibre to cover nonwoven fabrics and PE glued membrane successively unrestrained again, make polyurethane material roof liner half-blank;
(c), compression moulding: the polyurethane material roof liner half-blank of step b is pressed in mould, and the patrix temperature is controlled at 140 ℃ during compression moulding, and the counterdie temperature is controlled at 140 ℃ during compression moulding, and forming pressure is controlled at 75kgf/cm
2, molding time is controlled at 55sec, makes the compression moulding half-blank;
(d), cooling and shaping: the compression moulding half-blank of step c is cooled to normal temperature, makes its typing, hardening time is controlled at 45sec;
(e), lining is fitted: paste warp-knitted face fabric on the semi-finished lower surface behind the steps d cooling and shaping, then this half-blank is placed the pressurizing attaching of heating in the mould, the patrix temperature is controlled at 90 ℃ during applying, and the counterdie temperature is controlled at 90 ℃ during applying, and laminate pressure is controlled at 55kgf/cm
2, the applying time is controlled at 35sec;
(f), cooling and shaping: will be cooled to normal temperature through the half-blank that step e lining was fitted, and make its typing, hardening time is controlled at 55sec.
(g), water cutter cutting: will carry out the cutting of water cutter through the half-blank that step f cooling and shaping is crossed, cutting hydraulic pressure is controlled at 50000psi, and the Cutting Gas pressure-controlled is at 6.0kg/cm
2
(h), annex is installed: the half-blank of step g cutting is installed annex be finished product, annex has pad cotton, acoustical cotton, locating dowel pin, double buckle.
The device that forms with this roof liner and accessory assembling has following performance perameter:
1. flame retardance satisfies GMW3232,＜100mm/min;
2. acoustic efficiency satisfies GMW14189, and the evaluation by PATAC;
3. colour fastness to rubbing satisfies the requirement of ISO105-B06, test result≤3 grade;
4. smell satisfies the requirement of GMW3025, test result 〉=6 grade;
5. resistance to abrasion satisfies the requirement of GMW1423, through 300 times circulation rear surface outward appearances 〉=6 grades;
Example 3
Production Shanghai GM model is 258 roof liner, and the roof liner specification is 3060 * 1550mm.
The production technology of this roof liner is as follows:
(a), plastic roll: adopt the plastic roll machine to carry out plastic roll in polyurethane material matrix upper and lower surface, roller coating glue is the glue of aqua type, the plastic roll motor speed is controlled at 38 rev/mins, the upper and lower roller pitch of plastic roll machine is controlled at 8.5mm, and each single face spread on the upper and lower surface of polyurethane material matrix is controlled at 200g/m
2
(b), glass fibre is unrestrained: adopt the cutting machine cutting glass fibre, at the even glass fibre of unrestrained well cutting of each single face of the upper and lower surface of the polyurethane material matrix of step a, unrestrained amount is controlled at 150g/m
2, there is the upper and lower surface of the polyurethane material matrix of glass fibre to cover nonwoven fabrics and PE glued membrane successively unrestrained again, make polyurethane material roof liner half-blank;
(c), compression moulding: the polyurethane material roof liner half-blank of step b is pressed in mould, and the patrix temperature is controlled at during compression moulding: 135 ℃, the counterdie temperature is controlled at 135 ℃ during compression moulding, and forming pressure is controlled at 70kgf/cm
2, molding time is controlled at 52sec, makes the compression moulding half-blank;
(d), cooling and shaping: the compression moulding half-blank of step c is cooled to normal temperature, makes its typing, hardening time is controlled at 50sec;
(e), lining is fitted: paste needle punched non-woven fabrics on the semi-finished lower surface behind the steps d cooling and shaping, then this half-blank is placed the pressurizing attaching of heating in the mould, the patrix temperature is controlled at during applying: 80～90 ℃, the counterdie temperature is controlled at 85 ℃ during applying, and laminate pressure is controlled at 50kgf/cm
2, the applying time is controlled at 33sec;
(f), cooling and shaping: will be cooled to normal temperature through the half-blank that step e lining was fitted, and make its typing, hardening time is controlled at 50sec;
(g), water cutter cutting: will carry out the cutting of water cutter through the half-blank that step f cooling and shaping is crossed, cutting hydraulic pressure is controlled at 45000psi, and the Cutting Gas pressure-controlled is at 5.0kg/cm
2
(h), annex is installed: the half-blank of step g cutting is installed annex be finished product, annex has positioning checkpoint, double buckle, lamp door.
The device that forms with this roof liner and accessory assembling has following performance perameter:
1. flame retardance satisfies GMW3232,＜100mm/min.
2. acoustic efficiency satisfies GMW14189, and the evaluation by PATAC.
3. colour fastness to rubbing satisfies the requirement of ISO105-B06, test result≤3 grade.
4. smell satisfies the requirement of GMW3025, test result 〉=6 grade.
5. resistance to abrasion satisfies the requirement of GMW1423, through 300 times circulation rear surface outward appearances 〉=6 grades.
Three examples to sum up, the provable thus roof liner of doing with the low-density polyurethane expanded material, sound absorption qualities is good, rigidity is big, be difficult for saggingly fractureing, light weight, and pollution-free.This kind material can be carried out.
Claims (5)
1, a kind of wet process technique of low-density soft polyurethane foam top lining is characterized in that, described method comprises following steps:
(a), plastic roll: adopt the upper and lower surface plastic roll water of plastic roll machine at the used polyurethane material of roof liner, the plastic roll motor speed is controlled at 35～40 rev/mins, upper and lower roller pitch by the thickness of polyurethane material is regulated the plastic roll machine requires to regulate each single face spread of polyurethane material upper and lower surface according to the rigidity of roof liner;
(b), glass fibre is unrestrained: adopt the cutting machine cutting glass fibre, the glass fibre of evenly unrestrained well cutting on each single face of the upper and lower surface of the low-density soft polyurethane foam of step a, the density of glass fibre is defined as 90～180g/m according to the rigidity and the intensity of roof liner
2, there is the upper and lower surface of the soft polyurethane foam of glass fibre to cover nonwoven fabrics and PE glued membrane successively unrestrained again, make the low-density soft polyurethane foam top lining first product;
(c), compression moulding: the soft polyurethane foam top lining first product of step b is utilized press compression moulding in mould, form the compacting half-blank; When compression moulding, the patrix temperature is controlled at: 130～140 ℃, the counterdie temperature is controlled at: 130～140 ℃, forming pressure is controlled at: 65～75kgf/cm
2, molding time is controlled at: 50～55sec;
(d), first cooling and shaping: described compacting half-blank is cooled to normal temperature, makes its typing, form the typing half-blank;
(e), lining is fitted: paste decorative fabric at the semi-finished upper surface of described typing, the half-blank of should finalizing the design then places the pressurizing attaching of heating in the mould, forms the applying half-blank; The patrix temperature is controlled at during applying: 80～90 ℃, the counterdie temperature is controlled at: 80～90 ℃, laminate pressure is controlled at: 45～55kgf/cm
2, the applying time is controlled at: 30～35sec;
(f), cooling and shaping once more: described applying half-blank is cooled to normal temperature, makes its typing;
(g), water cutter cutting: utilize the high pressure water cutting machine to carry out the cutting of water cutter the applying half-blank behind the cooling and shaping, form the cutting half-blank; During cutting, cutting hydraulic pressure is controlled at: 40000～50000psi, the Cutting Gas pressure-controlled exists: 4.0～6.0kg/cm
2
(h), annex is installed: described cutting half-blank is installed annex be finished product.
2, the wet process technique of low-density soft polyurethane foam top lining according to claim 1 is characterized in that the glue among the step a is the glue of aqua type.
3, the wet process technique of low-density soft polyurethane foam top lining according to claim 1 is characterized in that the hardening time of steps d is controlled at: 45～55sec.
4, the wet process technique of low-density soft polyurethane foam top lining according to claim 1 is characterized in that the decorative fabric described in the step e is selected warp-knitted face fabric or needle punched non-woven fabrics for use.
5, the wet process technique of low-density soft polyurethane foam top lining according to claim 1 is characterized in that the hardening time of step f is controlled at: 45～55sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182815A CN101648548A (en) | 2009-09-07 | 2009-09-07 | Wet production process of low-density soft polyurethane foam top lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182815A CN101648548A (en) | 2009-09-07 | 2009-09-07 | Wet production process of low-density soft polyurethane foam top lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101648548A true CN101648548A (en) | 2010-02-17 |
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| CN200910182815A Pending CN101648548A (en) | 2009-09-07 | 2009-09-07 | Wet production process of low-density soft polyurethane foam top lining |
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| CN101987527A (en) * | 2010-08-09 | 2011-03-23 | 无锡吉兴汽车声学部件科技有限公司 | Wet process production process of polyurethane foaming ceiling local reinforcement |
| CN102019701A (en) * | 2010-08-09 | 2011-04-20 | 无锡吉兴汽车声学部件科技有限公司 | Production technique of automobile trunk |
| CN102173025A (en) * | 2011-02-01 | 2011-09-07 | 上海澳金玻璃钢制品有限公司 | Process for manufacturing foaming shower tray |
| CN102381256A (en) * | 2011-09-10 | 2012-03-21 | 无锡吉兴汽车声学部件科技有限公司 | Wet-method roof producing process by glass fibers spread with adhesive |
| CN102873933A (en) * | 2012-10-11 | 2013-01-16 | 烟台正海汽车内饰件有限公司 | Automobile roof formed by fibrilia net reinforced waste spinning cotton felt, and preparation method thereof |
| CN103434252A (en) * | 2013-08-09 | 2013-12-11 | 无锡吉兴汽车声学部件科技有限公司 | Wet production process for dispersed glass fiber roof |
| CN103481751A (en) * | 2013-08-22 | 2014-01-01 | 烟台正海汽车内饰件有限公司 | High-strength PU (polyurethane) skylight pulling plate with sandwich structure and preparation method thereof |
| CN103692760A (en) * | 2013-11-28 | 2014-04-02 | 湖州立方塑木新材料有限公司 | Method for manufacturing boards |
| CN104669356A (en) * | 2015-02-15 | 2015-06-03 | 舟山市瑞丰印刷有限公司 | Production method for drawing sheet |
| CN105015076A (en) * | 2015-07-27 | 2015-11-04 | 无锡吉兴汽车声学部件科技有限公司 | Wet-method manufacturing technology for waterproof nonwoven-cloth roof liner |
| CN105922663A (en) * | 2016-05-04 | 2016-09-07 | 芜湖正海汽车内饰件有限公司 | Method for producing anatomy car trim ceiling through dry process |
| CN106080433A (en) * | 2016-08-23 | 2016-11-09 | 无锡吉兴汽车声学部件科技有限公司 | The technique that acoustical cotton is installed at the roof by wet back side |
| CN112412672A (en) * | 2020-11-11 | 2021-02-26 | 上海新安汽车隔音毡有限公司 | Engine intake manifold sound-proof housing and manufacturing method thereof |
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| CN102019701A (en) * | 2010-08-09 | 2011-04-20 | 无锡吉兴汽车声学部件科技有限公司 | Production technique of automobile trunk |
| CN101987527A (en) * | 2010-08-09 | 2011-03-23 | 无锡吉兴汽车声学部件科技有限公司 | Wet process production process of polyurethane foaming ceiling local reinforcement |
| CN102173025A (en) * | 2011-02-01 | 2011-09-07 | 上海澳金玻璃钢制品有限公司 | Process for manufacturing foaming shower tray |
| CN102381256A (en) * | 2011-09-10 | 2012-03-21 | 无锡吉兴汽车声学部件科技有限公司 | Wet-method roof producing process by glass fibers spread with adhesive |
| CN102381256B (en) * | 2011-09-10 | 2013-09-18 | 无锡吉兴汽车声学部件科技有限公司 | Wet-method roof producing process of spreaded glass fibers with adhesive |
| CN102873933A (en) * | 2012-10-11 | 2013-01-16 | 烟台正海汽车内饰件有限公司 | Automobile roof formed by fibrilia net reinforced waste spinning cotton felt, and preparation method thereof |
| CN102873933B (en) * | 2012-10-11 | 2016-06-22 | 烟台正海合泰科技股份有限公司 | Roof of the vehicle of waste spinning cotton felt molding that fibrilia net strengthens and preparation method thereof |
| CN103434252B (en) * | 2013-08-09 | 2015-08-19 | 无锡吉兴汽车声学部件科技有限公司 | Scatter the wet process technique of glass fibre ceiling |
| CN103434252A (en) * | 2013-08-09 | 2013-12-11 | 无锡吉兴汽车声学部件科技有限公司 | Wet production process for dispersed glass fiber roof |
| CN103481751A (en) * | 2013-08-22 | 2014-01-01 | 烟台正海汽车内饰件有限公司 | High-strength PU (polyurethane) skylight pulling plate with sandwich structure and preparation method thereof |
| CN103692760A (en) * | 2013-11-28 | 2014-04-02 | 湖州立方塑木新材料有限公司 | Method for manufacturing boards |
| CN104669356A (en) * | 2015-02-15 | 2015-06-03 | 舟山市瑞丰印刷有限公司 | Production method for drawing sheet |
| CN105015076A (en) * | 2015-07-27 | 2015-11-04 | 无锡吉兴汽车声学部件科技有限公司 | Wet-method manufacturing technology for waterproof nonwoven-cloth roof liner |
| CN105015076B (en) * | 2015-07-27 | 2017-01-04 | 无锡吉兴汽车声学部件科技有限公司 | A kind of wet manufacturing process of water proof nonwoven cloth roof liner |
| CN105922663A (en) * | 2016-05-04 | 2016-09-07 | 芜湖正海汽车内饰件有限公司 | Method for producing anatomy car trim ceiling through dry process |
| CN106080433A (en) * | 2016-08-23 | 2016-11-09 | 无锡吉兴汽车声学部件科技有限公司 | The technique that acoustical cotton is installed at the roof by wet back side |
| CN112412672A (en) * | 2020-11-11 | 2021-02-26 | 上海新安汽车隔音毡有限公司 | Engine intake manifold sound-proof housing and manufacturing method thereof |
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